| 摘要 |
PROBLEM TO BE SOLVED: To make quality such as strength of ceiling beams constant while being an easy installing structure, and to restrain generation of indoor dewing by installing plural ceiling beams formed of a metallic section between mutually opposing two ceiling girders of a building unit, on the ceiling girders through an installing member having wooden both end parts. SOLUTION: Plural ceiling beams 8, 8 are installed at intervals between long edge side ceiling girders 6, 6 arranged between the upper end parts of adjacent respective columns of a building unit. The ceiling beams 8 are fixed by machine screws by inserting wooden installing members 82 into both end parts of a main body 81 formed of C shape steel with a lip, and the ceiling beams 8 are extended according to machine screw holes opened in the ceiling girders 6 to be fixed by wood screws. Since members other than both end installing members 82 are formed of C shape steel, quality such as strength and geometry becomes constant. Since the ceiling beams are installed on the ceiling girders 6 composed of C shape steel through the wooden installing members 82, a heat bridge and a cold bridge generated in the ceiling girders 6 from the ceiling beams 8 can be prevented, dewing is hardly caused, and the installation is extremely facilitated. |
